Christopher Reeve and Michael Keaton have both played DC superheroes. Christopher Reeve played Superman in Superman (1978), Superman II (1980), Superman III (1983) and Superman IV: The Quest For Peace (1987) and Michael Keaton played Batman in Batman (1989) and Batman Returns (1992)
One of the songs used in the score is widely known to Spanish speaking people "No se tu", sung by Luis Miguel, a popular pop singer in Mexico. For marketing reasons, the Spanish title for the movie in Mexico was changed to "No se tu".